diff options
| -rw-r--r-- | ChangeLog | 11 | ||||
| -rw-r--r-- | Makeconfig | 46 | ||||
| -rw-r--r-- | Makerules | 5 | ||||
| -rw-r--r-- | elf/Makefile | 1 |
4 files changed, 51 insertions, 12 deletions
@@ -1,3 +1,14 @@ +2015-02-12 Roland McGrath <roland@hack.frob.com> + + * Makeconfig (after-link): New variable. + (+link-pie, +link-pie-tests): Use it. + (+link-static, +link-static-tests): Likewise. + (+link, +link-tests): Likewise. + * Makerules (build-module, build-module-asneeded): Likewise. + (lib%.so, $(common-objpfx)libc.so, $(common-objpfx)linkobj/libc.so): + Likewise. + * elf/Makefile ($(objpfx)ld.so): Likewise. + 2015-02-12 Rüdiger Sonderfeld <ruediger@c-plusplus.net> [BZ #17965] @@ -387,6 +387,14 @@ LDFLAGS.so += $(hashstyle-LDFLAGS) LDFLAGS-rtld += $(hashstyle-LDFLAGS) endif +# Command to run after every final link (executable or shared object). +# This is invoked with $(call after-link,...), so it should operate on +# the file $1. This can be set to do some sort of post-processing on +# binaries, or to perform some sort of static sanity check. +ifndef after-link +after-link = +endif + # Command for linking PIE programs with the C library. ifndef +link-pie +link-pie-before-libc = $(CC) -pie -Wl,-O1 -nostdlib -nostartfiles -o $@ \ @@ -400,10 +408,15 @@ ifndef +link-pie $(common-objpfx)libc% $(+postinit),$^) \ $(link-extra-libs) +link-pie-after-libc = $(+postctorS) $(+postinit) -+link-pie = $(+link-pie-before-libc) $(rtld-LDFLAGS) $(link-libc) \ - $(+link-pie-after-libc) -+link-pie-tests = $(+link-pie-before-libc) $(rtld-tests-LDFLAGS) \ - $(link-libc-tests) $(+link-pie-after-libc) +define +link-pie +$(+link-pie-before-libc) $(rtld-LDFLAGS) $(link-libc) $(+link-pie-after-libc) +$(call after-link,$@) +endef +define +link-pie-tests +$(+link-pie-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \ + $(+link-pie-after-libc) +$(call after-link,$@) +endef endif # Command for statically linking programs with the C library. ifndef +link-static @@ -417,10 +430,14 @@ ifndef +link-static $(common-objpfx)libc% $(+postinit),$^) \ $(link-extra-libs-static) +link-static-after-libc = $(+postctorT) $(+postinit) -+link-static = $(+link-static-before-libc) $(link-libc-static) \ - $(+link-static-after-libc) -+link-static-tests = $(+link-static-before-libc) $(link-libc-static-tests) \ - $(+link-static-after-libc) +define +link-static +$(+link-static-before-libc) $(link-libc-static) $(+link-static-after-libc) +$(call after-link,$@) +endef +define +link-static-tests +$(+link-static-before-libc) $(link-libc-static-tests) $(+link-static-after-libc) +$(call after-link,$@) +endef endif # Commands for linking programs with the C library. ifndef +link @@ -436,10 +453,15 @@ ifeq (yes,$(build-shared)) $(common-objpfx)libc% $(+postinit),$^) \ $(link-extra-libs) +link-after-libc = $(+postctor) $(+postinit) -+link = $(+link-before-libc) $(rtld-LDFLAGS) $(link-libc) \ - $(+link-after-libc) -+link-tests = $(+link-before-libc) $(rtld-tests-LDFLAGS) \ - $(link-libc-tests) $(+link-after-libc) +define +link +$(+link-before-libc) $(rtld-LDFLAGS) $(link-libc) $(+link-after-libc) +$(call after-link,$@) +endef +define +link-tests +$(+link-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \ + $(+link-after-libc) +$(call after-link,$@) +endef else +link = $(+link-static) +link-tests = $(+link-static-tests) @@ -505,6 +505,7 @@ link-libc-deps = $(common-objpfx)libc.so $(common-objpfx)linkobj/libc.so \ # to be as similar as possible to a default link with an installed libc. lib%.so: lib%_pic.a $(+preinit) $(+postinit) $(link-libc-deps) $(build-shlib) $(link-libc-args) + $(call after-link,$@) define build-shlib-helper $(LINK.o) -shared $(static-libgcc) -Wl,-O1 $(sysdep-LDFLAGS) \ @@ -580,12 +581,14 @@ endef define build-module $(build-module-helper) -o $@ $(shlib-lds-flags) \ $(csu-objpfx)abi-note.o $(build-module-objlist) $(link-libc-args) +$(call after-link,$@) endef define build-module-asneeded $(build-module-helper) -o $@ $(shlib-lds-flags) \ $(csu-objpfx)abi-note.o \ -Wl,--as-needed $(build-module-objlist) -Wl,--no-as-needed \ $(link-libc-args) +$(call after-link,$@) endef build-module-helper-objlist = \ @@ -666,6 +669,7 @@ $(common-objpfx)libc.so: $(elf-objpfx)soinit.os \ $(elf-objpfx)ld.so \ $(shlib-lds) $(build-shlib) + $(call after-link,$@) $(common-objpfx)linkobj/libc.so: $(elf-objpfx)soinit.os \ $(common-objpfx)linkobj/libc_pic.a \ @@ -674,6 +678,7 @@ $(common-objpfx)linkobj/libc.so: $(elf-objpfx)soinit.os \ $(elf-objpfx)ld.so \ $(shlib-lds) $(build-shlib) + $(call after-link,$@) ifeq ($(build-shared),yes) $(common-objpfx)libc.so: $(common-objpfx)libc.map diff --git a/elf/Makefile b/elf/Makefile index f2d1781..b43b48e 100644 --- a/elf/Makefile +++ b/elf/Makefile @@ -349,6 +349,7 @@ $(objpfx)ld.so: $(objpfx)librtld.os $(ld-map) $(filter-out $(map-file),$^) $(load-map-file) \ -Wl,-soname=$(rtld-installed-name) \ -Wl,-defsym=_begin=0 + $(call after-link,$@.new) $(READELF) -s $@.new \ | $(AWK) '($$7 ~ /^UND(|EF)$$/ && $$1 != "0:" && $$4 != "REGISTER") { print; p=1 } END { exit p != 0 }' mv -f $@.new $@ |